1. Manifolds & Headers Offered
  2. sku: 11466888708142891
  3. 1ST RACING STHD-BBC03US

1ST-RACING STHD-BBC03US Exhaust Manifolds Big Block 396/454 6.5L 6.6L 402 7.4L

fits model: 396, 454. make: Chevy. year: 1965-73.

Sthd-bbc03us 1st-racing Exhaust Manifolds For Chevy Big Block 396/454 6.5l 396 6.6l 402 7.4l 454 1965-73

( Brand: 1st-racing ), ( Mounting Style: Bolt-on ), ( Items Included: Mounting Hardware ), ( Color: Silver ), ( Manufacturer Part Number: STHD-BBC03US ), ( Material: Stainless Steel ), ( Placement On Vehicle: Front ), ( Fuel Type: Gasoline ), ( Type: Exhaust Manifold ), ( Manufacturer Warranty: 1 Year ), ( Features: Polished ), ( Universal Fitment: No ), ( Country Of Origin: China )

Review 1ST-RACING Exhaust Manifolds Chevy Big Block 396/454 6.5l 6.6l 402 7.4l fits 396 454 1965-73

Introducing the 1st Racing STHD-BBC03US Exhaust Manifolds, specifically designed for Chevy Big Block engines with displacements ranging from 396 to 454 cubic inches, and 6.5L to 7.4L cylinder capacities. These engines were produced between the years 1965 and 1973.

The STHD-BBC03US Exhaust Manifolds are meticulously crafted using premium quality materials for unmatched durability and performance. Each manifold is engineered to provide an optimal exhaust gas flow rate, ensuring maximum power output from your Chevy Big Block engine.

The STHD-BBC03US Exhaust Manifolds feature a robust, high-performance design with large primaries and a precisely engineered collector to minimize backpressure and maximize exhaust flow. This results in a more potent engine response, especially during acceleration and high RPM operation.

The manifolds are manufactured using advanced casting techniques, ensuring a perfect fit and excellent heat dissipation. Each casting undergoes rigorous inspection and testing to ensure the highest level of quality and consistency.

Additionally, the exhaust ports are carefully designed to provide optimal exhaust gas velocity, which helps in improving the overall engine performance and fuel efficiency. These manifolds are also compatible with factory-installed emissions equipment, making them a perfect choice for those seeking improved performance while maintaining emissions compliance.

The STHD-BBC03US Exhaust Manifolds are engineered for easy installation, with bolt-on design that allows for quick and straightforward replacement of the OEM components. The manifolds come with all necessary hardware, ensuring a seamless installation process.

In summary, the 1st Racing STHD-BBC03US Exhaust Manifolds are a high-performance upgrade for Chevy Big Block engines, delivering increased power, improved engine response, and enhanced durability. With a robust design, precise engineering, and easy installation, these manifolds are an excellent choice for those seeking to maximize the potential of their Chevy Big Block engine.

Buying 1st racing STHD BBC03US exhaust manifolds for a Chevy Big Block engine (396/454, 6.5l, 396 6.6l 402, 7.4l 454, 1965-1973) comes with several pros and cons.

Pros:

1. Improved Performance: These manifolds are designed to enhance the engine's performance by reducing backpressure and increasing exhaust flow.

2. Durability: STHD BBC03US manifolds are made from high-quality materials, such as cast iron, and are engineered to withstand the rigors of high-performance applications.

3. Enhanced Sound: These manifolds produce a deep and throaty exhaust note, which is desirable for many performance enthusiasts.

4. Fit and Finish: The STHD BBC03US manifolds are known for their precise fit and finish, ensuring a seamless installation process.

Cons:

1. Cost: These manifolds are more expensive than stock manifolds, which can be a deterrent for some buyers.

2. Installation Complexity: Installing aftermarket exhaust manifolds can be a complex process, requiring specialized tools and expertise.

3. Exhaust System Compatibility: These manifolds may not be compatible with all exhaust systems, so it's essential to ensure that the rest of the exhaust system is also up to the task.

4. Heat Management: These manifolds can generate a significant amount of heat, which may require additional cooling measures.

Conclusion:

The decision to buy STHD BBC03US exhaust manifolds for a Chevy Big Block engine depends on individual priorities and performance goals. These manifolds offer improved performance, durability, and enhanced sound, but they come with a higher cost, installation complexity, and potential exhaust system compatibility issues. If you're looking to maximize the performance potential of your engine, these manifolds could be a worthwhile investment. However, if you're on a budget or prefer a more straightforward installation process, stock manifolds may be a better choice.

Recommendation:

If you're serious about maximizing the performance potential of your Chevy Big Block engine, consider investing in STHD BBC03US exhaust manifolds. However, be prepared for the additional cost, installation complexity, and potential exhaust system compatibility issues. If you're not ready for that level of commitment, consider other performance upgrades or sticking with stock manifolds. Ultimately, the decision is yours based on your performance goals, budget, and expertise.

part # sthdbbc03us prices

  • $120.00-$313.63

specifications maniheader:

  • for models: 396, 454
  • for makes: Chevy
  • for years: 1965-73
  • brand: 1st-racing
  • mounting style: Bolt-on
  • items included: Mounting Hardware
  • color: Silver
  • manufacturer part number: STHD-BBC03US
  • material: Stainless Steel
  • placement on vehicle: Front
  • fuel type: Gasoline
  • type: Exhaust Manifold
  • manufacturer warranty: 1 Year
  • features: Polished
  • universal fitment: No
  • country of origin: China

payments maniheader:

  • wallet: Apple-pay
  • credit card: Visa
  • other

seller maniheader:

  • # reviews: 6139
  • rating: 95.5%

offer maniheader:

  • started: March 31, 2026
  • availability: In Stock
  • quantity: 50
  • sold: 0
  • options: Ship-to-home
  • best offers: True

general maniheader:

  • Car Truck Parts Accessories > Exhaust Emission Systems > Manifolds Headers
  • condition: New

shipping maniheader:

  • type: Fixed
  • transit: 4-8 Days
  • cost: $0.00
  • class: Standard
  • service: UPS Ground
  • carrier: UPS

returns maniheader:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Seller
for models: 396, 454, for makes: chevy, for years: 1965-73, mounting style: bolt-on, items included: mounting hardware, placement on vehicle: front, fuel type: gasoline, type: exhaust manifold, manufacturer warranty: 1 year, features: polished, universal fitment: no, country of origin: china,
category: auto parts > car truck parts accessories > exhaust emission systems > manifolds headers, color: silver, material: stainless steel, sku: 11466888708142891,

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